Music box

Abstract

A music box comprises a comb having vibrating teeth, a drum having elements for plucking the comb for playing music, a driving source for rotating the drum, a speed governor for regulating rotation speed and a frame for supporting the comb, drum, driving source and speed governor. The speed governor further comprises an accelerating train having two worms and a control device provided on a last row of the accelerating train. A position maintaining element is integrally arranged with the frame for preventing at least the first worm positioned on the driving source side, of the two worms referred to, from moving in the thrust direction. In one form, the music box has a driving source which includes a spring. One end of the spring is engaged with a winding shaft arranged in a spring housing of the spring and the other end is engaged with an engagement section provided on the frame. A contact section is formed on the frame for preventing the other end of the spring engaged with the engagement section from moving out of the spring housing.

What is claimed is: 
     
       1. A music box comprising: a comb having vibrating teeth;   a drum having means for plucking said comb for playing music;   a driving source for rotating said drum;   a speed governor for regulating rotation speed of said drum;   a frame for supporting said comb, drum, driving source and speed governor;   said speed governor further comprising an accelerating train having two worms and control means provided on a last row of said accelerating train; and   position maintaining means being integrally arranged with said frame for preventing at least the first worm positioned on said driving source side, of said two worms, from moving in a thrust direction.   
     
     
       2. The music box as set forth in claim 1, wherein said position maintaining means energizes said first worm in the direction of a deviation force generated when said first worm is driven by said driving source. 
     
     
       3. The music box as set forth in claim 2, wherein said frame has a center, said driving source including a spring, and a winding shaft of said spring being arranged at the center of said frame. 
     
     
       4. The music box as set forth in claim 1, wherein said first worm has a shaft supported by a bearing formed on said frame, and an edge of said shaft contacts an elastic piece which constitutes said position maintaining means. 
     
     
       5. The music box as set forth in claim 4, wherein said elastic piece is a tongue piece integrally molded. 
     
     
       6. The music box as set forth in claim 5, wherein said elastic piece is a tongue piece integrally molded with an enclosure which encloses said driving source integrally formed with said frame. 
     
     
       7. The music box as set forth in claim 1, wherein said driving source is composed of a spring; one end of said spring being engaged with a winding shaft arranged in a spring housing which encloses said spring, and the other end of said spring being engaged with an engagement section provided on said frame; a contact section being formed on said frame for preventing the other end of said spring engaged with said engagement section from moving out of said spring housing. 
     
     
       8. The music box as set forth in claim 7, wherein said engagement section has a regulating member for regulating said other end of said spring from moving inwardly of the spring housing against a winding force applied on said winding shaft. 
     
     
       9. The music box comprising: a comb having vibrating teeth;   a drum having means for plucking said comb for playing music;   a driving source for rotating said drum;   a speed governor for regulating rotation speed of said drum;   a frame for supporting said comb, drum, driving source and speed governor;   said driving source including a spring;   one end of said spring being engaged with a winding shaft arranged in a spring housing of said spring, and the other end thereof being engaged with an engagement section provided on said frame; and   a contact section being formed on said frame for preventing said other end of said spring engaged with said engagement section from moving out of said spring housing.   
     
     
       10. The music box as set forth in claim 9, wherein said engagement section has a regulating member for regulating said other end of said spring from moving inwardly of the music box against a winding force on said winding shaft. 
     
     
       11. The music box as set forth in claim 9, wherein said frame allows a rotation shaft of said drum to be arranged in a direction perpendicular to the frame and a seat for mounting said comb to be formed in the perpendicular direction. 
     
     
       12. The music box as set forth in claim 11, wherein said contact section for preventing said spring from moving is projected in an L shape from said seat, and said seat and said frame being thus integrally formed.